Kum & Go has enlisted six internationally renowned practices to compete for design of its new $92 million headquarters planned for Des Moines, Iowa: Bjarke Ingels Group (BIG), Bohlin Cywinski Jackson, Morphosis, Renzo Piano Building Workshop, Safdie Architects, and Skidmore, Owings & Merrill LLP (SOM). The 24-hour convenience store chain plans to select an architect by mid-November. The 120,000-square-foot corporate office will be built on the north side of the Pappajohn Sculpture Park, between 14th and 15th streets.